satre



'tlfllsl-Islm H. E. SATRE BORING AND DUMPING AUGER Original Filed May 5. 1934 //&\\\\

July 9, 1940.

July 9, 1940. H, E, SATRE Re. 21,506

v BORING AND DUMPING AUGER 4 l OriginalFled May 5, 1934 2 Sheets-Sheet 2.

Hm r .5 re,

Reissued July 9, 1940 Re- 2150i BORING AND DMPING AUGER Hilmar E. Satre, Chicago, Ill., assigner to- First v Caisson Machinery & Boring Co., Chicago, Ill., a corporation of Illinois f Original No..1,997,313, dated April 9, 1935, Serial No. 724,128, May 5, 1934. 'Application for reissue March 29, 1937, Serial No. 134,560 L 8 claims.y

The present invention relates to that type of boring auger adapted to the excavating of deep holes for the reception of concrete in the' con- Astruction of piling, etc., and has particular reference to the excavating auger and cooperating means for discharging the vauger of its load of excavated material.

The principal object of the invention to which mand. interreiauon of the eiements by which the ealrthis dug, hoisted and discharged, all auto.

1F awaythedumped excavated material forms the subject n'iattjerv ofimy Patent No. 2,001,503, issued May 14, 1935.A

A preferred `embodiment .of the invention is hereinafter 'describedin detail, the said description being predicated upon the accompanying drawings, wherein 4Fig. 1 is. a vertical section `through the hole being dug, showing the auger bucket with its lead and drive vshaft and trip in side elevatio 25" near the bottom of the hole;

Fig. 2is asimilar view with the auger bucket in elevated position for dumping;

A Fig. 3 'is 'a vertical section through the auger 30.; 11.1 .dumping ,posltion.;

"Fig 4 is a' vertical section through the auger afterdumping andready to descend for further digging;

Fig. A5is agtop plan view of the .auger in the position'shown in Fig. 4; '6 is a detail.in perspective of the lower cutting element of the auger; and

'l is a fragmentary top plan as viewed from the line I -l of Fig. 2. f I lt'will be obvious that the invention is susceptible of embodiment in modified structural forms Without .departure from .the essential features thereof, wherefore the description and the drawings are to be taken in an illustrative rather than 45 `in a. limiting sense.

-Having reference to Fig. 1 of the drawings the excavation is.v illustrated at I I with the lead drive shaft axially disposed at I2 with its bit I3 in engagement with the earth. The boring auger 50" bucket I4 is shown near the bottom of the shaft ascending or. descending. The auger bucketis of the rotarytype driven by splined engagement with the rib I5 of theelead shaft I2 upon which it is guided vertically. f 56 Ilieauger is .hollow and is provided at the the several parts contribute is the coordination bottom with hinged'doors carrying marginal portions I6 provided with cutting edges Il and also one or more with side doors I8 provided with side cuttersl or reamers I9 which project beyond the side of the bucket and are renewably and adjustably mounted upon'doors at 20. The doors themselves are mounted upon hinges 2| disposed at an angle to the vertical whereby the tendency of the doors and their cutting edges is to'swing outward to the extent permitted by the limiting chains 22.

yIn oper`ation,`the weight of the bucket serves to dig by means of the cutters I1 into the earth. at the bottom of the hole, it being noted that the downwardlyext'ending clearing bits I'Ia by means ofl which the diametervof theexcavation is Well defined.

Inasmuch vas the cutters in their digging posi-v tion as illustrated y in Figs. l and 4 present an open-mouth above the downwardly and forwardly inclined cutting edges, the excavated material isy fed through such mouth into the interior of the bucket. At the same time the material from the side cutters or reamers I94 is fed through the mouth formedbetween the partially open door and the reamers I9, it being noted, that these side vcutters excavate beyond the bottom cutters, thus providing a space within which a liner of" any suitable construction may be positioned above the side cutters.

- The auger bucket having` become filled,4 the shaft I2 is given a slight movement in a counter direction "wherebythe side cutters I9 are retracted suflicientlynot to bite into the walls and tne auger bucket is concurrently elevated' along the shaft I2.

The rear end of conveyor mechanism is illustrated in Figs. 1 and 2 as including tractor members 23 and a frame 24 bifurcated at the end as most rclearly shown in Fig. '7. This bifurcated end of the frame extends above the hole vto a point near the lead shaft I2 and the frame sup- Y ports a traveling car or skip 25 including ,wheels- 26 which ride upon the frame. v f

During the digging operation and at the time the auger bucket is ascending the car is withdrawn from the rear end of the vconveyor frame delivering a load of material previously discharged therein so that the ,ascending auger bucket can pass between the bifurcated ends of the conveyor frame as indicated in Fig. 7.' yImmediately thereafter. the car assumes the position on the frame above the openingand cutters are provided at their outer corners with beneath the auger bucket as illustrated in Fig. 2. Above the bucket in line on each side of the lead shaft I2 are disposed in fixed position a pair of abutment triggers 21, the purpose of which will be later described.

Interiorly of the auger bucket is slidably mounted a follower plate 2B which occupies a position above the load of excavated material within the auger.

'I'his plate is attached by means of a chain 2|!v with one or more half doors 3|) whereby the doors with their cutting edges may be raised or lowered. The follower plate 28 is held in its elevated position by engagement with detents 3| on bothv sides thereof having noses 3Ia taking over the upper edge of the bucket as illustrated in Fig. 4. These noses are equipped with rollers 32 for a purpose hereafter made clear. The detents 3| are pivoted at 33 to the plate 28 above slots 28a` in said plate and each has a second nose 3Ib underlyinga sear 34 which engages the detent and holds the same in overhanging engagement with the upper edge of the bucket. These sears 34 are held in operative engagement with the 2li detents 3| by means of coil springs 35 seated in pockets 38.

'I'he skip car 25 having assumed a position beneathV the auger bucket I4, the continued upward movement of the auger causes the abutment triggers 21 to engage the sears. and to press the same downwardly against the tension of the springs 35 thereby causing the outer ends of the sears to ride downwardly of the detents 3| and` to engage the noses 3Ib tripping the detents about the pivots 33 and freeing the nose 3|a from the edge of the bucket. 'I'he weight of the excavated material uponthe door Il) and the continued upward movement of the bucket against the trigger abutmentsv 21 causes the' door to swing down- Lwardly to an open position as represented in Fig. 3, dumping the load of material in the skip car 25. Thereupon the car 25 is moved by the conveyor to the left away from ybeneath the bucket and the latter begins its movement in a lowering i direction.

. As the auger bucket descends from the position f shown in Fig. 3 the hooks 21a on the trigger abutments 21 lift the follower` plate by means of the detents` 3| which are held in the position shown in ?Flg.3 by engagement of the rollers 32 with the inside wall ofthe auger, thus progressively closing the door 30 by means of the chain 29 until simultaneously when the door has reached the closed position the noses 3|a ofthe detents 3| reach the open top of the bucket and snap over the edge thereof in thepositlon shown in Fig. 4.

'Ihus it will be seen that as the auger bucket lapproaches the upward limit of `its travel the skip caris positioned beneath the same and as the auger bucket reaches its upward limit the door operations and the renewed rotation of the lead` shaft I2 results in a renewal of the digging operation.

' I claim: v

1. An excavating and dumping auger comprising a hollow shell with cutters at its bottom and having associated with its bottom cutters a door,

a follower member movable within the shell and operatively connected to the door, latch mechanism for holding the follower in place in the upper part of the shell with the door closed when the auger is in lowered excavating position, a plunger device fixed above and in line with the latch mechanism and arranged when the filled auger reaches an elevated dumping position to trip the latch mechanism and cause the follower to release the door and discharge the contents and as the empty shell is lowered to restore the follower and with it the door to closed latched position.

2. An excavating and dumping auger comprising a substantially cylindrical hollow shell with cutters at its bottom and sides and having associated with its bottom cutters a hinged door, a follower plate member slidably movable within the shell above and operatively detached from the door, a pair of latch mechanisms comprising a detent and a sear acting thereon for holding the follower in place in the upper part of the shell with the door closed when the auger is in lowered excavating position, a trigger device comprising a pair of lrods fixed above and inline with the," latch mechanisms and arranged when the lfilled" auger reaches an elevated dumping position to trip the latch mechanisms and cause` the follower plate to descend and release the door and dis.

auger is in lowered excavating position, a plunger e device fixed above and inline` with the latch mechanism and arranged when the lled auger reaches an elevated dumping position to trip the latch mechanism and cause the follower to release the door and discharge the contents and as the empty shell is lowered to restore the follower and with it the door to closed latched position, in combination with a guiding and driving shaft splin'ed to the auger shell for relative axial movement' only.

. 4. An excavating and dumping auger comprising a substantially cylindrical hollow shell with cutters at its bottom and sides and having associated with its bottom cutters a hinged door, a follower plate member slidably, movable within the shell above and operatively detached vfrom the door, a pair of latch mechanisms comprising a detent and a sear acting thereon for holding the follower in place in the upper partVof the shell with the door closed ywhen the auger is ln lowered excavating position, a trigger device comprising a pair of rods fixed above and in line with the latch mechanisms and arranged when the llled auger reaches an elevated dumping position to trip the latch mechanisms and cause the follower plate to descend and release the door and discharge the contents and as the empty shell is lowered to restore the follower plate and with it r 5. An excavating and dumping auger comprls- 75 ing a substantially cylindrical hollow shell with a door at its bottom marginally provided with serrated cutting edges, those serrations adjacent the outer end of the cutting edges projecting downwardly and outwardly beyond the general line of the inner serrations.

6. An excavating and dumping auger comprising a substantially cylindrical hollow shell with a door at its bottom marginally provided with serrated cutting edges, those serrations adjacent the outer end of the cutting edges projecting downwardly and outwardly beyond the general line of the inner serrations, the auger also provided with a side door opening outwardly and having adjustably mounted thereon a reaming cutter, the outward swing of the side door and cutter adjustably controlled.

7. An excavating and dumping auger comp-rising a hollow shell with cutters at its bottom and having associated with its bottom cutters a door, a follower member movable Within the shell and operatively connected to the door, latch mechanism for holding the follower out of operation with the door closed when the auger is in lowered excavating position, a device arranged when the filled auger reaches a dumping position to contact and trip the latch mechanism and cause the follower to release the door and discharge the contents and as the empty shell is lowered to restore the follower and with it the door to closed latched position.

8. An excavating and dumping auger comprising a substantially cylindrical hollow shell with a door at its bottom marginally provided with serrated cutting edges, those serrations adjacent the outer end of the cutting edges projecting downwardly and outwardly beyond the general line of the inner serrations, the auger also provided with a side door opening outwardly and having thereon a reaming cutter, the outward swing of the side door with the reaming cutter adjustably controlled.

HILMAR. E. SATRE. 

